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Implications for Gold Mineralisation in the Gopapur Area, Keonjhar District, Orissa: A New Discovery | OMICS International| Abstract
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

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  • Research Article   
  • J Earth Sci Clim Change 2015, Vol 6(9): 304
  • DOI: 10.4172/2157-7617.1000304

Implications for Gold Mineralisation in the Gopapur Area, Keonjhar District, Orissa: A New Discovery

Manaswini Kar* and Venkatesh AS
Department of Mineral Exploration, Indian School of Mines, , Dhanbad, India
*Corresponding Author : Manaswini Kar, Department of Mineral Exploration, Indian School of Mines, Dhanbad, India, Tel: 0326-2235001, 0326-2235004, Email: [email protected]

Received Date: Aug 31, 2015 / Accepted Date: Sep 21, 2015 / Published Date: Sep 30, 2015


Gold deposits of Orissa can be broadly divided into three broad zones of Keonjhar, Mayurbhanj, and Sundargarh districts. In Keonjhar district gold occurrences have been reported from Saleikana-Dimirimunda-Kardangi sector in Telkoi block and Gopapur, Gajipur, Adal, Kushkala sector in Banspal block. Out of these localities Gopapur area seems to be the most promising one. The Precambrian metavolcanics of Gopapur in the Keonjhar district host auriferous quartz vein. In this area detailed exploration is carried out by GSI in 1:10000 scales with pitting, trenching, drilling, geological mapping and geochemical survey. The Quartz veins are found in the metavolcanics being emplaced along the prominent schistocity planes. Three sub parallel sets of quartz veins with high angle dip of are delineated. Gold mineralization is associated with the sulphides and oxides in quartz veins, basalts and laterites and ultramafic and is exposed on the surface as well as in underground trench faces. Gold occurs as refractory form and in free grains within quartz and intimate association with pyrite and chalcopyrite and oxides (haematite, goethite, magnetite and cuprite) in the form of refractory gold. The gold content of the mineralized quartz veins and lateritic wall rocks varies widely from 1 to 9 ppm. Fluid inclusion study shows the temperature ranges 250°C to 37°C and the gold deposit is of mesothermal type. The gold is formed by the remobilisation from sulphide bearing minerals to oxide bearing minerals. From the mineralogical and lithological assemblages the Gopapur prospect can be compared with Iron-formation-hosted vein and disseminated deposit that is Homestake gold deposit.

Keywords: Basalts; Eastern India; Gold, Iron ore group; Ultramafic rocks; Vein quartz

Citation: Kar M, Venkatesh AS (2015) Implications for Gold Mineralisation in the Gopapur Area, Keonjhar District, Orissa: A New Discovery. J Earth Sci Clim Change  6(9): 304 Doi: 10.4172/2157-7617.1000304

Copyright: © 2015 Kar M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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